Apparatus for spinning solutions of cellulose ethers or esters



June 24, 1930,

M. KLEIN APPARATUS'FIR- SPINNING SOLUTJC'NS OF CELLULOSE ETHERS OR ESTERS Filed March 27; 1928 2 sheets-sheet 1 wouw,

M. KLEIN 1,767,215

' APPARATUS FORSPININGSOLUTIONS OF CELLULOSE ETHEBS OR ESTERS .hml 24, 1930.

File@ March 27, 1928 I 2 sheets-sheet' 2 iga5- Patentdfdune 24, l1.930v

UNITED STATES .PATENT ori-"Icev NELITTA KLEIN, or VIENNA, AUSTRIA, AssIGNon To RUTH-Anno COMPANY, ING., or NEW YORK, N. Y.

APPARATUS FOR SPINNING SOLUTIONS OFCELLULOSE ETHERSOR ESTEIRS/ Application mea March 27, 192s, serial No. 265,156, and in France July e, 1927.

The specification of my pending patent application No.'2654,'158'iled Mar. 27, 1928 describes a chamber or cell for spinning cellulose ethers or esters in a downward direction, characterized by the fact that it isv into the upper zone passes through the dia? phragm and enters the lower zone, where- Y as the hot air contained in'this latter zone cannot pass into the upper zone, so that the spinning nozzle, and also the thread during` the rst stage of its travel, are maintaine at the temperature of the outer air admitted into said upper zone. 5 v i According to the present invention, each zone of the spinning cell orchamber is provided with orificesfor the admission and discharge of air, so that the circulation of the air and vapors of solvent in each of the zones is entirely independent of the circulation in the other zones and without appreciable infiuence on such circulation.

In orderfto bring about these mutually independent circulations, the same air may be employed in the successive circulations,

that is to say,whilst maintaining an in dependent circuit in each zone, the air which has been admitted into and discharged from one zone may entera second zone and, on

issuing therefrom, be passed, or not, through the other zones.

It is even possible (and may, in .certain cases, be advantageousyto sub]ect said air, either prior to its admission into a zone or after issuing therefrom, or at any point during its passage, to any suitable physical action, with the view, for example, of modifying its temperature or the degree of concentration of the vapors of the solvent; orv

again,V to add to said air, `at any desired point'of'its passage, vapors or gases of suitable nature for exercising any desired phy- `sical, chemical or other action on the thread.

`ning cell or chamber.

Some embodiments of spinning chambers accordlng to the present invention will now b described with reference to the accompanying drawings. Fig. l is a vertical section through a chamber provided with a horizontal diaphragm *obstructing the whole cross section of said chamber; Fig. 2 represents, also in vertical" section, a chamber provided with an oblique diaphragm; Figs. 3 to 5 are diagrams showing means enabling the same air to be utilized for the circulation in each zone of the spinningchamber.

A`I'nthe various figures, ABCD represents the spinning cell or chamber, F the spinning nozzle, H the thread, I a thread guide, and G the orifice through which the thread passes out; ,-MN represents a diaphragm in the spinning cell or chamber.

I'n the embodimentoshown in Fig. 1, vthe diaphragm MN is horizontal andextends between the two walls AC and BD of the spinning cell or chamber, so as to divide the latter into two distinct superimposed zones or compartments, the thread H passing through an orifice Z in the diaphragm.` The upper compartment, which contains the spinT ning nozzle F and is rovided with orifices E for the admission o cold air, is also provided with an Vaspiration orifice J, pierced in the wall. BD of the cell. "I-Iot air enters aspiration is effected through a convenientl number of orifices, such as L, also provided in the wall BD.

In the embodiment shown in Fig. 2, the diaphragm MN is oblique and the. aspira'- tion, at J, of the' air enterinor the upper zone through thev orifices E, is eected by means of a tube J1,"which rests on the diaphragm and the mouth J 2 of said tube is situated at a suitable distance from the thread H. Hot air is admitted into the lower zone through orifices K, as before, and passes out through any convenient number of orifices L provided in the wallsAC and BD ofthe spin- From `the foregoing it will be evident i I that the spinning cell or chamber in each of the embodiments described comprises two air circuits arising from two diferent sources; but, as already indicated, the same air ma b e utilized andcausedl to circulate throug the various compartments of the cell,with modification of its physical conditions as, for example, its temperature, at a convenient point in its circuit.

1n the form represented in Fig. 3, the upper compartment of the cell receives, at E, cold air which issues from said compartment at J, and passes through a heating apparatus V of any kind, to enter the lower compartment, at a suitable temperature, by way of the orifice K, from which compartment it issues, laden with vapors of .sol-

vent, through the orice L, and4 is led to the recovery apparatus.

According to Fig. 4, the air, which has previously been raised to the desired-temperature by any convenient means, is ladmitted into the lower Acompartment of the cell through the orifice or passage K, and issues from said compartment by wayof the tube L. It traverses a cooler V, of any type whatsoever, and enters, by way of the tube `or orifice E, into the upper compartment,

from which it is led to the recovery apparatus through the aspiration branch J.

Finally, Fig. 5 shows a modication in which the air follows, in the two zones of the cell, the same circuit as in Fig. 3, but receives, at a given point in its course, a fluid, gas orvapor, whichI is introduced through the tube X into the branch X1,

and mixes with the air prior to entering the.

lower compartment, the atmosphere of which latter-also differs in composition from that in the upper compartment. l

It will be understood that the arrangei ments described are given merely by way of example, and that the forms, materials and dimensions of the constituent parts, and also the details of construction, may be modified without departing from the scope of the invention. 'In particular, the methods of air circulation described with reference to Figs.

' 3 to 5 may be replaced by any others of any i suitable kind which maintain different atdividing the cell into superimposed zonesy to be successively traversed by the spun thread, and 'a spinning nozzle in the uppermost zone, each of said zones having admission and discharge orifices to permit the circulation' of air and solvent vapors therethrough. 1

3. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, at

least one diaphragm dividingA the cell into superimposed compartments to be successively traversed by the spun thread, .and a spinning nozzle in the uppermost compartment each of said compartments having admission and discharge orices to permit the circulation of air and solvent vapors.

' 4. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, a diaphragm dividing the cell into two superimposed compartments to be successively traversed by the spun thread, and a'spinning nozzle in the upper compartment, the u per compartment-having an inlet for col orifice, and the lower compartment having an inlet for hot air and an outlet orifice.

. 5. Apparatus for spinning cellulose ethers.

or esters, comprising a spinning cell, means dividing the cell into 'superimposed compartments to be successively traversed by the spun thread,`a spinning nozzle in the uppermost compartment, and means whereby air can be circulated in separate circuits through the compartments one after another.

6. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, means dividing the cell into superimposed compartments to be successively traversed by the spun thread, a spinning nozzle in the uppermost compartment, and means whereby air from a single source can be circulated successively through the. compartments.

7 Apparatus for spinning cellulose ethers or esters, comprising-a spinning cell, means dividing the cell into vsuperimposed 'conipartments to be successively traversed by the spun thread, a spinning nozzle in the uppermost compartment, means wherebyair from a single source can be successively circu-v lated-through all thel compartments, and

means for modifying the air in its course.

air. adjacent the spinning nozzle and an outlet 8. Apparatus for spinning cellulose ethers or esters comprising a' spinning cell, means dividing the cell into Ysuperimposed compartments to be successively traversed by the spun thread, a spinning nozzle in the uppermost compartment, means whereby air from a single source can be successively circulated through each of the compartments, and means for modifying the air in its course. l

9. Apparatus forspinning cellulose ethers or esters, comprising a spinning cell, means l dividing the cell.. into superimposed comnaitmentsV to be successivelv traversed hv thel spun thread, a spinning nozzle in the uppermost compartment, means whereby air from a single source can be successively circulated through all the compartments, and means for modifying the temperature of the' air in its course.

l0. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, means dividing the cell into superimposed compartments to be successively traversed by the spun thread, a spinning nozzle in the uppermost compartment, meansl whereby air from a single source can be successively circulated through all the compartments, and means for modifying the composition of the air in its course. I

`11. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, means dividing the cell into superimposed compartments to be successively traversed by thespun thread, a spinning nozzle in' the uppermost compartment, means whereby air from a single source canbe successively cir'- culated through all the compartments, and means for modifying both the temperature and the composition of the air in its course. 12."Apparatus for spinning cellulose ethers or esters, comprising va spinning cell, means dividing the cell into superimposed compartments to be -successively traversed by the spun thread, a Spinnin nozzle in the uppermost compartment, piping' establish mg communication between the compart-v ments, an air inlet to one compartment and an outlet from another compartment, and a vheat exchanger associated with the piping.

cellulose 13.' Apparatus for spinning ethers or esters, comprislng a spmning cell,

j means dividing the cell into superimposed compartments to be successively traversed by fthe spun thread, a spinning nozzle in the uppermost compartment, plping establish' 4ing communication between the compartments, an air mlet'to one compartment and an outlet from another compartment, and means whereby an extraneous fluid medium -can be introduced into the piping.

14. Apparatus for .spinning cellulose ethers or esters, comprising a spinning cell,

means dividing the cell into superimposed compartments to be successively traversed by the spun thread, a spinning-nozzle inthe uppermost compartment, piping establishing communication between vthe compartments, an air inlet to one compartment and an outlet from another compartment, a heat exchanger associated with the piping,and means whereby an extraneous fluid medium can be introduced into the piping.

15. Apparatus for spinning cellulose ethers or esters, comprising a spinning cell, a diaphragm dividing the cell into two superimposed compartments to be successively traversed by the spun thread, a spinning nozzle in the upper compartment, an air inning nozzle in the upper compartment, an

air inlet to the upper compartment located adjacent the nozzle, an air and solvent Vapor outlet from the lower compartment, a pipe establishing' communication between the lower portions of said compartments, a

heater for the pipe, and means whereby an `extraneous fluid medium can be introduced into the` pipe.v

In testimony whereof I affix my signature.4

MELITTA KLEIN.

4for spinning cellulose sov 

